Piston-rod packing.



y PATENTBD MAmze, 1907;. A E. G.BosTW1oK. 1 PISTON ROD PACKING.APPLICATION FILED JUNE 16,1906.

i Q v. l7/////////// UNrrnD srnrnsgiilrnrvr lorries. EDWIN G. BOSTWICK,OF KALAMAZOO, MICHIGAN.

PISTON-ROD PACKING.

Specification of Letters Patent.

Patented March 26, 1907.

T0 @ZZ when?, t may concern:

slots c are oppositely arranged`fi. e., the

Be it known that I, EDWIN G. BosTwIoK, a slit of one of the cones opensinto one of the citizen of the United States, residing at Kalamazoo,county of Kalamazoo, State of Michigan, have invented certain new anduseful Improvements in Piston-Rod Packings, of which the following is aspecification.

This invention relates to improvements in piston-rod packings.

The objects of this invention are, first, to provide an improvedpiston-rod packing which is effective for the purpose and very durable;second, to provide an improved piston-rod packing which is automaticallyadjusted to compensate for wear.

Further objects and objects relating to structural details willdefinitely appear from the description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, in which` Figure 1 is a detailsection of a structure embodying the features of myinvention, taken on aline corresponding to line 1 l of Fig. 3, the piston-rod B being shownin full lines. Fig. 2 is a plan of my improved ring C. Fig. 3 is asection taken on a line corresponding to line 3 3 of Fig. 2.

In the drawings similar letters of reference refer to similar partsthroughout the several views, and the sectional views are taken lookingin the direction of the little arrows at the ends of the section-lines.

Referring to the lettered parts of the drawings, A represents acylinder-head, and B a piston-rod. The cylinder-head is provided on theinside with a pocket A', through 'which the piston-rod is arranged, andwith a gland A. This packing-gland is secured in position by suitablebolts, as a.

My improved packing-ring is of metal and is in the form of a double coneand is provided with an annular groove c between the cones. The ring Calso has oppositely-arranged circumferential slots c in the groovedportion thereof. The cones of ring C are also cut or slotted at c, whichslots extend from the edges .of the cones to the circumferential slitsc. The slots c are cut diagonally through the cones, as illustrated. The

metallic slots c and the other into the opposite slot c. (See Fig. 3.)By thusslotting the ring the two cones are joined together only by theparts c". (See Fig, 3.)

A concaved ring C is arranged in the gland A to form a seat for thepacking-ring. A

concaved follower or compression-ring C is provided, the ring C heldagainst the packing-ring by the coiled spring C, which is arranged inthe pocket A on the cylinderhead. As this follower or'compression-ring Cis forced upon the ally compresses it as it is Worn away by the packingring it gradupiston-rod, thereby maintaining a tightI joint. The annulargroove and the slits readily permit this and also allow the two coneportions of the packing-rings to close up or compress independently ofeach other.

y forming and arranging the parts as I have illustrated and described Isecure a piston-rod packing which is very effective and at the same timedoes not have an undue amount of friction or tension upon thepiston-rod. It automatically adjusts itself for wear and requirespractically no attention until worn out. It is very easilyapplied andmay be used on structures now in common use. If found necessary, thering may be divided for placing upon the piston-rod. In doing this thering is preferably cut through each cone to the center slits C onopposite sides of the ring, breaking the joints.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isl l. The combination with a cylinder-headand piston-rod, of a gland, a double-cone packing-ring having an annulargroove between its cones with opposite circumferential slots in the saidgroove, the said cone portions having radial slots therethrough openinginto said circumferential slots; a concaved seat-ring for saidpackingring arranged in said gland; a concaved follower orcompression-ring for said packingring; substantially as described.

2. The combination of a double-cone metallic packing-ring having anannular groove between its cones with circumferential slots in the saidgroove, the said cone portions having radial slots therethrough openinginto said circumferential slots; a concaved seat for said packing-ring;a concaved IIO lower or compression-ring; and .a coiled spring arrangedto bear thereon, as specified.

5. The combination of a double-cone metallic packing-ring having anannular peripheral groove between its cones; a con 2 caved seat for saidpacking-ring; a concaved follower or compression-ring, substantially asdescribed.

In witness whereof I have hereunto set my hand and seal in the presenceof two wit- 2 DQSSGS.

EDWIN G. BOSTWICK. [n s] Witnesses:

LULU G. GREENFIELD, O'rrs A. EARL.

